GB3TD Frequency Change from 18th Oct 2019 – Action Required

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The Swindon UHF repeater GB3TD has been operational on the same frequency 433.075 MHz and from the same site since 1994 and is managed by the Ridgeway Repeater Group.

In recent years the repeater has been suffering from interference in the form of clicking and pulsing noises and also from wideband transmissions which can severely desense incoming signals.

The group has spent many hours trying to determine the source of some of these without success.

OFCOM were consulted and tried their best to identify the problem without actually finding it due to restrictions gaining access to certain areas of private property.

The main interference to our secondary use band is from 433MHz to 435MHz which emanates from low power devices but also the MOD which is the primary user of the band.

When GB7TC our DMR repeater was commissioned and co-sited with GB3TD and using the same antenna, the filtering system was complicated and caused extra losses in the system. Never the less has worked well.

A question was asked to the RSGB repeater committee asking if a 7.6MHz wide band split would be possible for GB3TD.

The RRG were asked if the group would like to try a reverse shift to the normal TX-low, RX-high configuration.

GB3TD output frequency will be 438.4375 and the TD receive will be 430.8375.

This was agreed upon and an NOV issued to Rob, G4XUT.

The benefit is that the filtering for GB3TD and GB7TC will be easier with less through losses with both TX and RX being at the same ends of the band.

On Thursday 24th October, Andrew (M1CJE),  Dom (2E0WHQ) and possibly others will be helping out anyone who is having problems re-tune or re-program your handheld, mobile or base station radios. They will be providing a couple of laptops running CHIRP (the popular radio programming software), a selection of programming leads and assistance to get your radios up and running on the new frequencies. A dummy load, frequency counter, with CTCSS checking will also be available so that the new configuration can be checked. Additionally, a 13.8v PSU will be available for mobile radios.

If you are interested in getting your radio re-programmed or just want to learn how to do it, then please come along and bring your radio with you. We should have the facilities to cater for most of the popular brands and models of radio including Baofeng, Wouxon, QTY (and clones), Yaesu, Kenwood & ICOM.

Members’ Equipment Sale – 17th October

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On October 17th we will be holding a Members’ Equipment Sale.

With Winter fast approaching, many turn to construction projects to help fill those long, dark nights. Our sale is just the place to find that obscure part or perhaps a restoration project to work on.

Bargains are to be had, as sellers tend to keep their prices to a sensible level and there is always the option to haggle a bit!

You may wish to bring along items to sell or just browse the tables as a buyer – all are welcome to attend.

Fees are as follows:

  • SDARC Member Seller’s Table – Free
  • Non Member Seller’s Table – £3
  • SDARC Member Entrance – Free
  • Non Member Entrance – £1
  • Refreshments – £1.50 (all)

Club Christmas Dinner 2019

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Yes, you may have become so embroiled in the machinations at Westminster that you failed to notice that Christmas is just around the corner!!!!

Following our recent two successful visits to the Harvester in Blunsdon, we are again booked in there for our Christmas Dinner and Awards evening.

This year’s date for your diary is Thursday 5th December. We are nominally booked for 19.30 for 19.45.

You have a choice of a 2 course menu for £15.49 or a 3 course one for £18.99.


Please see the above files for menu choices and a form to bring along to the club when making payment.

Minimum deposit of £5 on initial booking or you can choose the pay the full amount.


New Licencees

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Congratulations are due to three brand new licensees.  Club members John, Steve & Kris all passed their Foundation exam last Saturday with SDARC.  All three candidates passed with excellent scores and we look forward to hearing them on the bands shortly.

Thanks also to Mike M5CBS for kindly providing the exam venue and refreshments.

11/07/2019 – 50MHz UKAC

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There will be an attempt to participate in the 50MHz UKAC this evening from Pine Trees using a Moxon antenna. If conditions are poor then the fallback is to 40m.

FM Activity Contest Resources

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A few weeks ago Dom gave us a talk on the FM Activity Contents (FMAC) and promised to provide links to some useful resources he uses. Please find them below.

Dom also reports he is extremely happy with the upturn in activity during these contests and hopes to keep working you in the future.

Programme Change – Short Talk: FMAC!

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Dom has agreed to give us a 20-30 minute introduction to FM activity contests. The aim is to inspire you to take part and to help the club climb the league tables.

UKAC Report

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We are up to tenth place this month from twelfth in the 2M UKAC.  Thanks to the efforts of M0IEP, M1CJE, M1KDJ & 2E0WHQ.  If you fancy having a go the contests are on a Tuesday evening.  For more info talk to one of the above or just switch the rig on and have a go.  Rules are available at Entering just one contest will help the overall club score.

Construction Competition 2019 Results

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Congratulations to all the participants. The entries were of a great standard. The judging was performed by G4LDL, G0VTA and M1DST.

The entries were as follows…


  • M1CJE – RF Power Meter – Winner!


  • M0RFI – Capacitive Touch Paddle with Keyer – Winner!
  • M0ZGB – UnUn
  • M0ZGB – Clock Face
  • M1CJE – Clamp-on RF Meter


  • M7RTX – Shortwave Receiver – Winner!


  • M0ZGB- Lindenblad 70CM Antenna – Winner!
  • M1CJE – Sleeve Choke

The judges decided that the overall winner of the evening was M0RFI with his keyer.

It would be great to see even more entries next year. Time to start building.

G3JOT – Frank Whatley SK ●●●▬●▬

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Frank operating in the 2004 VHF NFD

Peacefully at the Great Western Hospital on 4th March 2019, aged 96 years, with his family by his side. Devoted and loving husband to Daisy, he will be sadly missed by his daughter Karen and son-in-law Michael, grandchildren Alex and Jess and all who knew him.

The funeral was held on 25th March 2019 at the Kingsdown crematorium.

Frank was an avid radio amateur and was appointed President of the radio club in recognition for his length of service. He was referenced in an Evening Advertiser article as Auditor as far back as 1955 but we are unsure how much further back Frank’s commitment to the club spanned.